Japanese developers have created a device that leaves the label with special ink on the offender.

This way, you can fight against harassment and inappropriate behavior in public transport, the developers are confident. A limited first batch of appliance called Shachihata was bought out in half an hour. In total, they sold 500 gadgets, each costing $ 25.

The seal, visible only under ultraviolet light, will allow victims of harassment in crowded buses and subway cars to spot the assailants and deter potential offenders. This will make it easier for police officers to identify and catch the attackers.